package com.ljl.forum_1.services.impl;

import com.ljl.forum_1.common.AppResult;
import com.ljl.forum_1.common.ResultCode;
import com.ljl.forum_1.dao.ArticleMapper;
import com.ljl.forum_1.exception.ApplicationException;
import com.ljl.forum_1.model.Article;
import com.ljl.forum_1.model.Board;
import com.ljl.forum_1.model.User;
import com.ljl.forum_1.services.IArticleService;
import com.ljl.forum_1.services.IBoradService;
import com.ljl.forum_1.services.IUserService;
import com.ljl.forum_1.utils.StringUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.Date;
import java.util.List;

/**
 * Keafmd
 *
 * @ClassName: ArticleServiceImpl
 * @Description: ArticleServiceImpl
 * @author: lijl
 * @date: 2025/2/9 9:31
 * @Blog: https://keafmd.blog.csdn.net/
 */
@Slf4j
@Service
public class ArticleServiceImpl implements IArticleService {

    @Resource
    private ArticleMapper articleMapper;
    // 用户和板块操作
    @Resource
    private IUserService userService;
    @Resource
    private IBoradService boradService;

    @Override
    public void create(Article article) {
        // 非空校验
        if (article == null || article.getUserId() == null || article.getBoardId() == null
            || StringUtil.isEmpty(article.getTitle())
            || StringUtil.isEmpty(article.getContent())) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 设置默认值
        article.setVisitCount(0);// 访问数
        article.setReplyCount(0);// 回复数
        article.setLikeCount(0); // 点赞数
        article.setDeleteState((byte)0);
        article.setState((byte) 0);
        Date date = new Date();
        article.setCreateTime(date);
        article.setUpdateTime(date);

        // 写入数据库
        int articleRow = articleMapper.insertSelective(article);
        if (articleRow <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_CREATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        // 获取用户信息
        User user = userService.selectById(article.getUserId());
        if(user == null) {
            // 打印日志
            log.warn(ResultCode.FAILED_CREATE.toString() + " ，发帖失败， user id = " + article.getUserId());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        // 更新用户的发帖数
        userService.addOneArticleCountById(user.getId());

        // 获取板块信息
        Board board = boradService.selectById(article.getBoardId());
        // 是否在数据库中有对应的板块
        if(board == null) {
            // 打印日志
            log.warn(ResultCode.FAILED_CREATE.toString() + " ，发帖失败， board id = " + article.getBoardId());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_CREATE));
        }
        // 更新板块的发帖数
        boradService.addOneArticleCountById(board.getId());

        // 打印日志
        log.info(ResultCode.SUCCESS.toString() + ", user id = " + article.getUserId()
                + ", board id = " + article.getBoardId()+ ", article id = " + article.getId() + "发帖成功");
    }

    @Override
    public List<Article> selectAll() {
        // 调用DAO
        List<Article> articles = articleMapper.selectAll();
        // 返回结果
        return articles;
    }

    @Override
    public List<Article> selectAllByBoardId(Long boardId) {
        // 非空校验
        if (boardId == null || boardId <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 校验板块是否存在
        Board board = boradService.selectById(boardId);
        if(board == null) {
            // 打印日志
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }
        // 调用DAO，查询
        List<Article> articles = articleMapper.selectAllByBoardId(boardId);
        // 返回结果
        return articles;
    }

    @Override
    public Article selectDetailById(Long id) {
        if (id == null || id <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 调用DAO
        Article article = articleMapper.selectDetailById(id);
        if (article == null) {
            // 打印日志
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        // 更新帖子的访问次数
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setVisitCount(article.getVisitCount() + 1);
        // 写入数据库
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if(row != 1) {
            // 打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
        // 返回结果
        article.setVisitCount(article.getVisitCount() + 1);
        return article;
    }

    @Override
    public Article selectById(Long id) {
        if (id == null || id <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 调用DAO
        Article article = articleMapper.selectByPrimaryKey(id);
        return article;
    }

    @Override
    public void modify(Long id, String title, String content) {
        if(id == null || id <= 0 || StringUtil.isEmpty(title) || StringUtil.isEmpty(content)) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 构建要更新的贴子对象
        Article updateArticle = new Article();
        updateArticle.setId(id);
        updateArticle.setTitle(title);
        updateArticle.setContent(content);
        updateArticle.setUpdateTime(new Date());
        // 调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            // 打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void thumbsUpById(Long id) {
        if (id == null || id <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 调用DAO
        Article article = articleMapper.selectByPrimaryKey(id);
        if(article == null || article.getState() == 1 || article.getDeleteState() == 1) {
            // 打印日志
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setLikeCount(article.getLikeCount() + 1);
        updateArticle.setUpdateTime(new Date());

        // 更新数据库
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            // 打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }

    @Override
    public void deleteById(Long id) {
        if (id == null || id <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 根据id查询帖子信息
        Article article = articleMapper.selectByPrimaryKey(id);
        if(article == null || article.getDeleteState() == 1) {
            // 打印日志
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        // 构造一个更新对象
        Article updateArticle = new Article();
        updateArticle.setId(article.getId());
        updateArticle.setDeleteState((byte)1);
        // 调用DAO
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row != 1) {
            // 打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }

        // 更新版块帖子数量
        boradService.subOneArticleCountById(article.getBoardId());
        // 更新用户帖子数量
        userService.subOneArticleCountById(article.getUserId());
        log.info("删除帖子成功，article id = " + article.getId() + ", user id = " + article.getUserId());
    }
}
